<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-button type="primary">添加角色</el-button>
      <el-table :data="roleList" border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 一级权限 -->
              <el-col :span="5" style="padding: 20px 50px">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级权限 -->
              <el-col :span="19">
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 主体列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
        ></el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
        ></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限弹出区域 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClose"
    >
      <el-tree
        :data="rightsList"
        :props="propList"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="theTree"
      >
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  components: {},
  props: {},
  data() {
    return {
      roleList: [],
      setRightDialogVisible: false,
      rightsList: [],
      propList: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: null
    }
  },
  computed: {},
  watch: {},
  created() {
    this.loadRoleList()
  },
  mounted() {},
  methods: {
    async loadRoleList() {
      const { data } = await this.$http.get('roles')
      if (data.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.roleList = data.data
    },
    async removeRightById(role, rightId) {
      const result = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (result !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      // 用户点击了确定表示真的要删除
      // 当发送delete请求之后，返回的数据就是最新的角色权限信息
      const { data } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (data.meta.status !== 200) {
        return this.$message.error('删除角色权限失败')
      }

      role.children = data.data
    },
    async showSetRightDialog(role) {
      this.setRightDialogVisible = true
      const { data } = await this.$http.get('rights/tree')
      if (data.meta.status !== 200) {
        return this.$message.error('获取权限树失败')
      }
      this.rightsList = data.data

      // 为分配权限发起请求获取ID
      this.roleId = role.id

      this.getLeafKeys(role, this.defKeys)
      console.log(this.rightsList)
    },
    getLeafKeys(item, arr) {
      if (!item.children) {
        return arr.push(item.id)
      }
      item.children.forEach(item => this.getLeafKeys(item, arr))
    },
    setRightDialogClose() {
      this.defKeys = []
    },
    async allotRights() {
      const selectedData = [
        ...this.$refs.theTree.getCheckedKeys(),
        ...this.$refs.theTree.getHalfCheckedKeys()
      ]
      const idStr = selectedData.join(',')

      const { data } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr
        }
      )
      if (data.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.loadRoleList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
